I started a new project and rebuilt it in VFP 9. The application stopped complaining and I will not be upgrading unless something else breaks.

It will cost about $690 to upgrade and that is just too much.

Here's what I got from a mail order:
The order shows that you want to upgrade to a PDF Creator Developer licence for All Windows platforms. The product that you currently license is the PDF Converter, Professional Developer license for Windows NT/2000/XP/2003, version 2.0.

To upgrade to the latest version 2.5 of the PDF Converter Developer License for NT/2000/XP/2003, you will need to pay 75% of the current price of the product that you own, that is USD 920 x 0.75 = USD 690

Way too much for us or our clients. If it was in the $200-$300 range, we would go, but can't go almost $1000.